a strong wall built across a river to stop the water and make a lake
dam
something that you buy or keep to remember a special event or holiday:
souvenirs
to be connected to, or to be about, someone or something:
related to
to remove all the objects or people from a place:
clear
one of the two hard, pointed growths on the heads of cows, goats, and some other animals
horns
to make something exist, happen, or be used for the first time:
introduce
to change something so that it is suitable for a different use or situation
adapt
animals, birds, and plants living in their natural environment:
wildlife